/*
 * Copyright 2009 Brook Smith brook.smith@paradise.net.nz.
 * 
 * Licensed under the Apache License, Version 2.0 (the "License"); you may not
 * use this file except in compliance with the License. You may obtain a copy of
 * the License at
 * 
 * http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under
 * the License.
 */
package org.javagenerate.generator.script.gen;

import java.util.ArrayList;
import java.util.List;

import org.javagenerate.generator.MethodDefinition;
import org.javagenerate.generator.NamingUtils;
import org.javagenerate.generator.Parameter;
import org.javagenerate.generator.script.BasePatternGenerator;
import org.javagenerate.generator.script.ClassDef;
import org.javagenerate.generator.script.GenBeanDefinition;
import org.javagenerate.generator.script.PatternRef;

public class DTOHelperDef extends ClassDef {

	private List<GenBeanDefinition> beans = new ArrayList<GenBeanDefinition>();

	private String interfaceName;

	public DTOHelperDef(String classname, String patternName) {
		super(classname, patternName);
	}

	/**
	 * Instead of creating the beans, create a copy method but leave it right
	 * until the end so all the dependancies can be defined
	 */
	@Override
	public void addBeanDefiniation(GenBeanDefinition beanDefinition) {
		beans.add(beanDefinition);
	}
	
	private void addCopyMethod() {
		// define the copy method
		MethodDefinition copyDefinition = new MethodDefinition("void", "copy");
		copyDefinition.setStatic(true);
		copyDefinition.addParameter(new Parameter("source", getInterfaceName()));
		copyDefinition.addParameter(new Parameter("dest", getInterfaceName()));

		String content = "";
		for (GenBeanDefinition beanDefinition : beans) {
			if (Character.isLowerCase(beanDefinition.getType().charAt(0))) {
				
				BasePatternGenerator generator = PatternRef.getBasePatternGenerator(beanDefinition.getType());
				ClassDef classDef = generator.getClass("helper");
				getImports().add(classDef.getPackageName() +"."+ classDef.getClassName());
				content += "if (source."+beanDefinition.getAccessorName()+"() == null)\n{dest."+beanDefinition.getMutatorName()+"(null);\n}";
				// a bit of jiggery pockery
				content += " else if (dest."+beanDefinition.getAccessorName()+"() == null)\n{";
//				content += "if (dest instanceof "++") ";
				
				content += classDef.getClassName() + ".copy(source."+beanDefinition.getAccessorName()+"(), dest."+beanDefinition.getAccessorName()+"());}\n";
			} else {
				content += "dest." + beanDefinition.getMutatorName() + "(source." + beanDefinition.getAccessorName() + "());\n";
			}
		}

		copyDefinition.setContent(content);
		addMethod(copyDefinition);
	}

	private String getInterfaceName() {
		return interfaceName;
	}

	public void setInterfaceName(String interfaceName) {
		this.interfaceName = interfaceName;
	}

	@Override
	public void preWrite() {
		super.preWrite();
		addCopyMethod();
	}
	
	@Override
	public String toString() {
		return super.toString();
	}

}
